There is no gravity: pieces lock when you hard drop. For the snappiest feel, use a low DAS (about 6–8F), ARR 0 and instant soft drop. Settings are saved in this browser.
Field notes
Finesse
Finesse means reaching a placement with the fewest key presses. A held DAS press counts as one input, same as a tap.
Any placement on a flat board takes at most 3 inputs here. If you need 4, there is a shorter route.
Going to a wall? Hold DAS once instead of tapping. One column off the wall? DAS, then tap back.
Rotate the short way: one ↺ instead of three ↻, and the 180 key instead of two of either.
Vertical I, S and Z have two resting columns per orientation. ↻ and ↺ land one column apart, so pick the one that saves a tap.
Learn it slow. Clean inputs at 1 PPS turn into clean inputs at 3 PPS; sloppy ones don't.
Perfect clears
A 4-line PC fills 40 cells, which is exactly 10 pieces. With hold you choose those 10 from the first 11 you see.
Never cover a hole. Any empty cell under a block means that row can't clear.
Split the field into regions mentally. Each enclosed region must hold a multiple of 4 cells.
Keep I pieces and O pieces flexible; they fix bad parity late. T, S and Z are the ones that create awkward shapes.
After a PC, 10 pieces have been used, so the next PC starts 3 pieces into a bag. There are 7 bag positions; practise each with the PC # selector.
The solver tries straight drops first, then tucks and SRS spins. Numbers on the full solution show the order; a highlighted label means hold first.